Masquerain is a light blue Pokémon with two pairs of rhombus-shaped wings on each side of its body. Its head is shaped like an elongated teardrop with a pink face and round, black eyes. On either side of its head is a large antenna that resembles an angry eye. The antennae are white with pink along the lower rim. White lines along the rim resemble eyelashes, while a large, dark pink dot in the middle represents the pupil or iris. These eyespots are used to intimidate enemies.
Masquerain's four wings allow it to fly in any direction and hover, but it cannot fly when its wings are wet. Additionally, rainy weather causes its antennae to become heavy and droop. In order to protect its wings and antennae, this Pokémon will shelter under trees or the eaves of houses. Masquerain lives on water's edge.
Masquerain debuted in A Fan with a Plan, under the ownership of Drew. It was seen training with its Trainer for the upcoming Rubello Town Pokémon Contest, which was held in the following episode. It has since made further appearances in Pokémon the Series: Ruby and Sapphire.
In Destiny Deoxys, a Masquerain is Audrey's main Pokémon. It helped the group rotate the fan blades of the windmills in LaRousse City.
In The Great Eight Fate!, a Masquerain was part of Juan's Sootopolis City Water Exhibit. It and Juan's other Pokémon were captured by Team Rocket, but they all worked together to escape.
In Dewpider Ascending!, a Masquerain was living near the Pokémon School as a Surskit. Surskit evolved during a battle against a Dewpider over its territory. The battle ended when Masquerain, pleased with its evolution, flew off and allowed Dewpider to live near the Pokémon School.
In The Rise of Darkrai, Darkrai hit a Masquerain with a Dark Void.
In Old Rivals, New Tricks!, a Coordinator's Masquerain competed in the Performance Stage of the Sandalstraw Contest.
In Zoroark: Master of Illusions, multiple Masquerain were living in Crown City.
In Genesect and the Legend Awakened, multiple Masquerain were living at Pokémon Hills.
In A Relay in the Sky!, a Trainer's Masquerain competed in the Pokémon Sky Relay. It was in a team also consisting of Hydreigon and Butterfree.
A Masquerain appeared in a flashback in A Watershed Moment!.
In Volcanion and the Mechanical Marvel, a Masquerain was living at Nebel Plateau.
In Battle Royal 151!, a Trainer's Masquerain competed in the Battle Royal preliminary round of the Manalo Conference but ended up losing.
A Masquerain appeared in HZ001.
||Masquerain, the Eyeball Pokémon. Masquerain is the evolved form of Surskit. Its feelers, which resemble eyeballs, help to throw off opponents. It is able to hover in the sky like a helicopter.
In The Cavern, a wild Masquerain was flying away from a storm that a Primal Kyogre was creating.
- Masquerain can be seen as a counterpart to Araquanid. Both share the Bug type and the same base stat totals, and both can be found at Malie Garden in Pokémon Sun and Moon, taking the place of the other depending on the time, with Masquerain being found during the night and Araquanid in the day.
- Of all changes to base stat totals, Masquerain received the largest increase at 40 in Generation VII.
Masquerain seems to be based on a variety of insects. Although rarely shown, it apparently has the ability to walk on the surface of water using its wings as if they were legs, so it may be based on a water strider. Its Japanese name suggests inspiration from moths, many of which use eyespots to frighten would-be predators. Its habitat, translucent wings, and hovering flight pattern are reminiscent of dragonflies and damselflies. Its raindrop-shaped head resembles some lanternflies. Its mimicry of an angry face is similar to a mask or cat face.
Masquerain may be a combination of masquerade (a disguise) and rain.
Amemoth may be a combination of 雨 ame (rain) or 水黽 amenbo (water strider) and moth.